No Hyundai Sonata model year rates as one to avoid in CarVitals data. The strongest years are 2020, 2022, and 2024. Below is every year (2005–2024) ranked best to worst, with the owner-reported problems behind each verdict.
Hyundai Sonata problems by year
Refreshed 8th-generation Sonata with modern Smartstream engines, big tech and strong fuel economy, past the fuel-tank recall years. A comfortable, efficient, well-equipped used midsize that has shed the brand's earlier engine-reliability reputation.
- Fuel-tank check-valve defect allowing the tank to pressurize and expand toward hot exhaust components (fire risk)
- HVAC blower-motor and fuse-box overheating, with the blower fuse repeatedly burning out
- Excessive oil consumption, check-engine lights and sudden loss of power
Well-rounded, efficient 8th-generation Sonata that rates a touch below average for reliability and falls under the fuel-tank check-valve recall. Confirm the recall; otherwise a comfortable, well-equipped used midsize with a long warranty history.
- Fuel-tank check-valve defect allowing the tank to pressurize and expand toward hot exhaust components (fire risk)
- HVAC blower-motor and fuse-box overheating, with the blower fuse repeatedly burning out
- Excessive oil consumption, check-engine lights and sudden loss of power
Strong 8th-generation Sonata: modern engines, excellent fuel economy, a spacious high-tech cabin and good value. The fuel-tank check-valve recall still applies (verify it was completed), but engine reliability is much improved over the Theta II years.
- Fuel-tank check-valve defect allowing the tank to pressurize and expand toward hot exhaust components (fire risk)
- HVAC blower-motor and fuse-box overheating, with the blower fuse repeatedly burning out
- Excessive oil consumption, check-engine lights and sudden loss of power
Modern, tech-rich and efficient 8th-generation Sonata, though this year rates slightly below average for reliability and falls under the fuel-tank check-valve recall. Confirm the recall and check for HVAC blower-fuse and oil-consumption complaints.
- Fuel-tank check-valve defect allowing the tank to pressurize and expand toward hot exhaust components (fire risk)
- HVAC blower-motor and fuse-box overheating, with the blower fuse repeatedly burning out
- Excessive oil consumption, check-engine lights and sudden loss of power
All-new 8th-generation Sonata leaves the Theta II era behind with modern Smartstream engines, sharp styling and strong fuel economy. The main concern is a fuel-tank check-valve recall (the tank can expand toward hot exhaust); confirm that recall was performed.
- Fuel-tank check-valve defect allowing the tank to pressurize and expand toward hot exhaust components (fire risk)
- HVAC blower-motor and fuse-box overheating, with the blower fuse repeatedly burning out
- Excessive oil consumption, check-engine lights and sudden loss of power
Final 7th-generation Sonata: comfortable, well-equipped and safer on the engine front than the earlier LF years, though oil consumption can still appear. A solid used midsize with a long warranty and good value.
- Theta II 2.4L GDI engine (2015-2017): connecting-rod-bearing failure and sudden engine seizure
- Engine-bay fire and smoke events prompting knock-sensor-detection software and fire-prevention recalls
- Excessive engine oil consumption with spark-plug fouling and misfires
Later 7th-generation Sonata: refined, roomy and good value, with fewer catastrophic engine failures than 2015-2017, though excessive 2.4L oil consumption remains a common complaint. A reasonable used pick with a documented service history.
- Theta II 2.4L GDI engine (2015-2017): connecting-rod-bearing failure and sudden engine seizure
- Engine-bay fire and smoke events prompting knock-sensor-detection software and fire-prevention recalls
- Excessive engine oil consumption with spark-plug fouling and misfires
Quiet, comfortable midsize with good value, but the 2.4L Theta II engine still carries seizure and oil-consumption risk (engine recall plus knock-sensor software). Verify the recall and check oil consumption before buying.
- Theta II 2.4L GDI engine (2015-2017): connecting-rod-bearing failure and sudden engine seizure
- Engine-bay fire and smoke events prompting knock-sensor-detection software and fire-prevention recalls
- Excessive engine oil consumption with spark-plug fouling and misfires
Refined and roomy 7th-generation Sonata, but the 2.4L Theta II engine carries a seizure and oil-consumption risk addressed by recall and a fire-prevention software update. Confirm the recall was performed and monitor oil use.
- Theta II 2.4L GDI engine (2015-2017): connecting-rod-bearing failure and sudden engine seizure
- Engine-bay fire and smoke events prompting knock-sensor-detection software and fire-prevention recalls
- Excessive engine oil consumption with spark-plug fouling and misfires
Comfortable and well-equipped, but 2015-2017 cars use the Theta II 2.4L engine with documented rod-bearing seizure and heavy oil consumption (engine recall plus knock-sensor software). Verify the recall and watch oil levels.
- Theta II 2.4L GDI engine (2015-2017): connecting-rod-bearing failure and sudden engine seizure
- Engine-bay fire and smoke events prompting knock-sensor-detection software and fire-prevention recalls
- Excessive engine oil consumption with spark-plug fouling and misfires
Final 6th-generation Sonata: roomy, comfortable and well-equipped, but the 2.4L GDI Theta II engine still carries a real seizure risk. Verify the engine recall and warranty extension and listen for knock before buying.
- Theta II 2.4L GDI engine: connecting-rod-bearing wear causing knocking, sudden stalling and complete engine seizure
- High-pressure fuel-line leaks creating an engine-bay fire risk
- ABS and hydraulic brake faults, including the pedal sinking to the floor
Well-equipped midsize, but the 2.4L GDI Theta II engine has a documented rod-bearing failure and seizure record (engine recall plus a fire-related fuel-line recall). Confirm recall completion and check for knock and oil consumption.
- Theta II 2.4L GDI engine: connecting-rod-bearing wear causing knocking, sudden stalling and complete engine seizure
- High-pressure fuel-line leaks creating an engine-bay fire risk
- ABS and hydraulic brake faults, including the pedal sinking to the floor
Striking design and strong value, but the 2.4L GDI Theta II engine carries a serious rod-bearing failure and seizure history (recall plus extended powertrain warranty). Confirm recall completion and check for engine knock and oil loss before buying.
- Theta II 2.4L GDI engine: connecting-rod-bearing wear causing knocking, sudden stalling and complete engine seizure
- High-pressure fuel-line leaks creating an engine-bay fire risk
- ABS and hydraulic brake faults, including the pedal sinking to the floor
Approach with caution unless the Theta II 2.4L GDI engine recall is documented as completed: this year drew very heavy complaints of rod-bearing wear, knocking and sudden engine seizure, plus a fuel-line fire recall. Verify the engine warranty extension and listen for knock.
- Theta II 2.4L GDI engine: connecting-rod-bearing wear causing knocking, sudden stalling and complete engine seizure
- High-pressure fuel-line leaks creating an engine-bay fire risk
- ABS and hydraulic brake faults, including the pedal sinking to the floor
Final 5th-generation Sonata: reliable non-GDI engines, comfortable and good value. Watch for salt-belt subframe and brake-line corrosion, seized calipers and airbag-sensor warning lights. A dependable used pick when rust-free.
- Brake-line corrosion, ABS module water intrusion and seized brake calipers
- Passenger-seat occupant-classification sensor fault leaving the airbag warning light illuminated
- Rear subframe and control-arm corrosion in salt-belt regions
Solid 5th-generation Sonata with conventional, pre-GDI engines that avoid the later Theta II failures. Main issues are corrosion (rear subframe, brake lines), seized brake calipers and a cracking dashboard. Dependable if rust-free.
- Brake-line corrosion, ABS module water intrusion and seized brake calipers
- Passenger-seat occupant-classification sensor fault leaving the airbag warning light illuminated
- Rear subframe and control-arm corrosion in salt-belt regions
5th-generation Sonata with conventional, reliable engines and strong value. Airbag occupant-sensor warning lights, brake-caliper seizing and salt-belt corrosion are the recurring complaints. Inspect the underbody before buying.
- Brake-line corrosion, ABS module water intrusion and seized brake calipers
- Passenger-seat occupant-classification sensor fault leaving the airbag warning light illuminated
- Rear subframe and control-arm corrosion in salt-belt regions
5th-generation Sonata with dependable pre-GDI engines and a roomy cabin. Main owner gripes are airbag occupant-sensor warning lights and salt-belt corrosion of the rear subframe and brake lines. A solid budget pick if rust-free.
- Brake-line corrosion, ABS module water intrusion and seized brake calipers
- Passenger-seat occupant-classification sensor fault leaving the airbag warning light illuminated
- Rear subframe and control-arm corrosion in salt-belt regions
Redesigned 5th-generation Sonata with reliable non-GDI engines and good value, but the highest complaint volume of the generation centers on a passenger-airbag occupant-sensor warning light. Watch for salt-belt subframe and brake-line corrosion.
- Brake-line corrosion, ABS module water intrusion and seized brake calipers
- Passenger-seat occupant-classification sensor fault leaving the airbag warning light illuminated
- Rear subframe and control-arm corrosion in salt-belt regions
Final year of the older Sonata platform: a cheap, roomy, basic sedan with a durable conventional drivetrain. Salt-belt rear-subframe and brake-line corrosion plus airbag-sensor warning lights are the main age-related risks. Inspect the underbody.
- Brake-line corrosion and hydraulic brake faults, including the pedal sinking to the floor
- Rear subframe and control-arm corrosion in salt-belt regions, leading to suspension component failure
- Passenger airbag / occupant-sensor warning light stays illuminated